Omeprazole Impurity 43 CAS 151602-50-5
| CAS No. | 151602-50-5 |
| Molecular Formula | C16H17N3O2S |
| Molecular Weight | 315.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Omeprazole Impurity 43 (C16H17N3O2S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Omeprazole Impurity 43 (CAS 151602-50-5) is a certified pharmaceutical impurity reference standard with the molecular formula C16H17N3O2S and a molecular weight of 315.39 g/mol.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Omeprazole Impurity 43 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C16H17N3O2S |
| Molecular Weight | 315.39 g/mol |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Omeprazole Standards
- Omeprazole EP Impurity B (CAS 110374-16-8)
- Omeprazole Impurity 37 (CAS 73590-60-0)
- Omeprazole Impurity 7 (CAS 103877-02-7)
- Omeprazole Impurity 46 (CAS CATO-C4X-125546)
- Omeprazole Impurity 47 (CAS CATO-C4X-125547)
- Omeprazole EP Impurity G (CAS 125656-83-9)
- Omeprazole EP Impurity F (CAS 125656-82-8)
- Omeprazole Impurity 12 (CAS CATO-C4X-125512)
Recommended Standards
- Tirofiban Impurity 42 (CAS 142374-01-4)
- Esomeprazole Impurity 70 (CAS 103876-98-8)
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- Esomeprazole Impurity 58 (CAS CATO-C4X-111258)
- Enrofloxacin Impurity 7 (CAS 93107-31-4)
- Baricitinib Impurity 87 (CAS CATO-C4X-226087)
- Erlotinib Impurity 28 (CAS CATO-C4X-106928)
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- Desvenlafaxine Benzoate (CAS 1147940-37-1)
- 5-(4-Fluorophenyl)-1H-pyrrole-2-carboxylic Acid (CAS 153783-33-6)
- Methyl 5-chloro-1H-pyrrolo[2,3-b]pyridine-6-carboxylate (CAS 1305324-76-8)
- 4-Methyl-2-(4-(pyrrolidin-1-yl)quinolin-2-yl)thiazole (CAS 853333-52-5)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
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